19986040

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8191}}^1$

素因数の和:8263

約数の個数: 32

約数和(自身を含む): 45711360

約数和(自身を除く): 25725320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8191, 16382, 32764, 40955, 65528, 81910, 163820, 327640, 499651, 999302, 1998604, 2498255, 3997208, 4996510, 9993020, 19986040]

約数ペア:

[(1, 19986040), (2, 9993020), (4, 4996510), (5, 3997208), (8, 2498255), (10, 1998604), (20, 999302), (40, 499651), (61, 327640), (122, 163820), (244, 81910), (305, 65528), (488, 40955), (610, 32764), (1220, 16382), (2440, 8191)]